1) Zinc mineral 
Ordóñezite is a rare tetragonal zinc antimonate mineral with chemical formula: ZnSb2O6. ==Discovery== Ordóñezite was first discovered and documented by Ezequiel Ordóñez (1867-1950), a Mexican geologist, formerly director of the Geological Institute of Mexico. It was first described in 1953 for an occurrence with cassiterite in veins in rhyol...